Re: BBC iPlayer - some programmes not downloading fully

After trying the new version of plugin for bbc, I found the speed of downloading gets slower, and I was reminded of unexpected EOF.
The setting I am using :

Plugin version :1.40
Freferred quaility 480p
RTMP port 1935(default)
CDN: akamai
enable tor
download subtitles

Is it because HDS has higher priority than rtmp?
How can I change the plugin into the former version of 1.31 if I want to ?

Thank you.